[Openstack-stable-maint] Stable check of openstack/oslo.middleware for ref refs/heads/stable/train failed

Build failed. https://zuul.opendev.org/t/openstack/buildset/95035caa15104e26970a8dd3424816... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/cf4265acc2b44a9482b0cc9640cfd653 : SUCCESS in 6m 55s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/31b20a9c05f74172be4430b384fbe233 : FAILURE in 3m 16s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/67f125274abc44a0b024266f3ea5a6a1 : SUCCESS in 2m 50s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/12416544003d4781b7d77ba740362034 : FAILURE in 3m 13s